BENCH: split spatial benchmark imports
BENCH: split spatial benchmark imports

As the different parts were added at different times, it's better to
import them separately so that only specific benchmarks stop working for
old scipy versions.

zerothi/scipy,Stefan-Endres/scipy,grlee77/scipy,gertingold/scipy,WarrenWeckesser/scipy,Eric89GXL/scipy,aeklant/scipy,Stefan-Endres/scipy,andyfaff/scipy,WarrenWeckesser/scipy,zerothi/scipy,Stefan-Endres/scipy,lhilt/scipy,arokem/scipy,andyfaff/scipy,jor-/scipy,grlee77/scipy,gfyoung/scipy,mdhaber/scipy,e-q/scipy,tylerjereddy/scipy,Eric89GXL/scipy,anntzer/scipy,aeklant/scipy,matthew-brett/scipy,perimosocordiae/scipy,rgommers/scipy,gertingold/scipy,lhilt/scipy,endolith/scipy,gertingold/scipy,aeklant/scipy,nmayorov/scipy,rgommers/scipy,person142/scipy,rgommers/scipy,jamestwebber/scipy,gertingold/scipy,Eric89GXL/scipy,andyfaff/scipy,mdhaber/scipy,pizzathief/scipy,nmayorov/scipy,nmayorov/scipy,nmayorov/scipy,aeklant/scipy,endolith/scipy,aarchiba/scipy,andyfaff/scipy,pizzathief/scipy,endolith/scipy,gfyoung/scipy,aarchiba/scipy,scipy/scipy,jor-/scipy,person142/scipy,pizzathief/scipy,e-q/scipy,jor-/scipy,zerothi/scipy,perimosocordiae/scipy,arokem/scipy,lhilt/scipy,tylerjereddy/scipy,ilayn/scipy,mdhaber/scipy,Stefan-Endres/scipy,perimosocordiae/scipy,grlee77/scipy,jor-/scipy,gfyoung/scipy,mdhaber/scipy,arokem/scipy,jamestwebber/scipy,jamestwebber/scipy,pizzathief/scipy,ilayn/scipy,vigna/scipy,gfyoung/scipy,matthew-brett/scipy,jamestwebber/scipy,scipy/scipy,rgommers/scipy,scipy/scipy,e-q/scipy,vigna/scipy,grlee77/scipy,ilayn/scipy,perimosocordiae/scipy,zerothi/scipy,arokem/scipy,scipy/scipy,vigna/scipy,anntzer/scipy,vigna/scipy,zerothi/scipy,mdhaber/scipy,Eric89GXL/scipy,tylerjereddy/scipy,WarrenWeckesser/scipy,scipy/scipy,matthew-brett/scipy,matthew-brett/scipy,nmayorov/scipy,ilayn/scipy,vigna/scipy,gfyoung/scipy,WarrenWeckesser/scipy,person142/scipy,perimosocordiae/scipy,tylerjereddy/scipy,jor-/scipy,person142/scipy,e-q/scipy,endolith/scipy,Stefan-Endres/scipy,anntzer/scipy,andyfaff/scipy,pizzathief/scipy,endolith/scipy,scipy/scipy,rgommers/scipy,Eric89GXL/scipy,aarchiba/scipy,lhilt/scipy,mdhaber/scipy,arokem/scipy,andyfaff/scipy,WarrenWeckesser/scipy,aarchiba/scipy,endolith/scipy,perimosocordiae/scipy,aarchiba/scipy,jamestwebber/scipy,lhilt/scipy,Stefan-Endres/scipy,Eric89GXL/scipy,e-q/scipy,WarrenWeckesser/scipy,gertingold/scipy,matthew-brett/scipy,tylerjereddy/scipy,person142/scipy,zerothi/scipy,aeklant/scipy,grlee77/scipy,ilayn/scipy,anntzer/scipy,ilayn/scipy,anntzer/scipy,anntzer/scipy